I wasn't sure what to title this thread, or what to search on to see if anyone else has had it occur. I saw a "hazardous maneuver" thread, and this might fall into that category, for some unknown reason. My "turning technique" will be considered as such by me for a while. "Dangerous" from "Ridiculous". LOL I was flying up the beach, with full forward right stick (pitch), and at maximum speed. I don't remember the wind direction. I decided to head back, and I'll admit to a rather absurd 180 degree turning method. Barely any left bank, and full left "rudder", until my heading was back the way I was traveling, and then I neutralized everything but the full forward pitch. So basically I slid the P3P around 180 degrees rather abruptly while traveling at maximum speed. I can see as this might confuse the accelerometer interaction with the compass and GPS. It apparently did, and it got STUCK in the "confused state". GET THIS: AFTER ROTATING MY HEADING 180 DEGREES, THE P3P KEPT GOING IN THE SAME DIRECTION, BACKWARDS! That got my attention very quickly. I was rather astonished, and naturally went to neutral and now I'm going to ruin this story as far as providing useful trouble shooting. Before I could evaluate the effectiveness of different control inputs, I backed into my self imposed 500m geo-fence, and stopped. Just before, I had of course neutralized the forward pitch. And I stopped, but nearly simultaneously got the "distance limit reached prompt." As I was kind of concerned, I didn't do the obvious experiment -- pull the pitch control backwards and see if it went forward away from my geo-fence limit back towards me. I just saw that after neutralizing, it was just sitting there, and full forward didn't move me forward. At this point, I hit RTH, and whatever state I got the bird into apparently was cleared out, and it started to head on back to me. After a short time I cancelled the return to home, and everything worked fine. To me, the moral of the story is that I had somehow got my quad into an abnormal state from which it couldn't escape, and DJI luckily designed their RTH function to clear out whatever was stuck. "Experimenting" with stick inputs would have been interesting, but RTH was the correct response. DOES ANYONE HAVE ANY IDEAS, COMMENTS (No, I won't turn this way again) OR SIMILAR EXPERIENCE? An abrupt turn that is nearly all a skid is ridiculous thing to do. In an airplane it would be all rudder and it wouldn't turn fast -- for a 180 degree turn it wouldn't enter anyone's mind of a nanosecond. In a helicopter, I'd fear dying. LOL So why I turned this abruptly with no coordinated controls is a mystery too me. But given there is no "turn coordinator" so you can see if you are making a coordinated turn (i.e. One in which the forces remain perpendicular to the air-frame. So you could drink from a glass of water during a steeply banked turn in a plane. Even in a barrel roll!) you won't be perfectly coordinated. But I took it nearly as extreme as you can get, and achieved a rather interesting result, which is a bug, because I don't think a state like this should persist. ???